Enum ProjectionKind 

pub enum ProjectionKind {
    Pca,
    KernelPca,
    LaplacianEigenmap,
    UmapSphere,
}

Which projection family the pipeline uses for the outer sphere.

A first-class tunable axis: SearchSpace::projection_kinds enumerates the families the auto-tuner sweeps, and CorpusFeatures → PipelineConfig meta-models can map corpus profiles onto the kind that works best.

Variants

Pca

Linear PCA — fast, variance-maximizing. Good default for dense, low-noise embeddings.

KernelPca

Kernel PCA with a Gaussian (RBF) kernel. Captures nonlinear manifold structure at O(n²) fit cost.

LaplacianEigenmap

Laplacian eigenmap over a Jaccard-similarity graph of active axes. Connectivity-preserving; preferred when signal lives in the co-activation structure of a sparse embedding rather than in coordinate variance (the typical failure mode of PCA on 128-dim noise-heavy corpora).

UmapSphere

UMAP-on-sphere via Adam in the tangent bundle of S². PCA warm start, kNN attractive + uniform-negative repulsive, optional supervised category term. Preferred when angular ordering on the sphere matters more than raw variance preservation, and when a modest fit cost (O(n²·epochs) for the kNN graph + iterations) is acceptable.

Implementations

impl ProjectionKind

pub fn name(self) -> &'static str

Short stable name for logs and tuner reports.

pub fn all() -> &'static [ProjectionKind]

All supported kinds, in a stable order.

Trait Implementations

impl Clone for ProjectionKind

fn clone(&self) -> ProjectionKind

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ProjectionKind

impl Debug for ProjectionKind

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ProjectionKind

fn default() -> ProjectionKind

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ProjectionKind

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ProjectionKind

impl Hash for ProjectionKind

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ProjectionKind

fn eq(&self, other: &ProjectionKind) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for ProjectionKind

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ProjectionKind